April 22, 1987: Extremely Hazardous Substance List and Threshold Planning Quantities; Emergency Planning and Release Notification Requirements; Final Rule. (52 FR 13378) This FR notice contains the EHS list of chemicals as published in 1987. This list has been revised over time and should not be used for current compliance purposes. The current EHS list can be found at 40 CFR 355.

Note: EPA was required to publish this Interim Final Rule 30 days after EPCRA was passed. This rule established the list of extremely hazardous substances (EHSs) and their threshold planning quantities (TPQs). This rule also codifies the reporting and notification requirements for facilities at which EHSs are present. This rule was later finalized on April 22, 1987

• Final Rule: 52 FR 13378 (PDF)(33 pp, 18 MB)
• November 17, 1986: Interim Final Rule. 51 FR 41570 (PDF)(23 pp, 3 MB)